In light of known attacks against SHA-1 and the NIST guidance on 1024 bit keys and SHA-1 hashes, I came to the conclusion that DSA1 keys will not provide enough security anymore in near future. Therefore, I have decided to move to a new key until the end of year 2013.
You may view my transition notice here. Furthermore, my new key with ID 0x666DB8BD can be obtained directly from this server. Moreover, the key is uploaded at least to the following key servers:

• pgp.mit.edu
• subkeys.pgp.net
• pool.sks-keyservers.net

If you are using my public key, please perform the corresponding tasks to ensure that you will update your keyring, such that – at least on Janurary 1st, 2014 – you will only use my new key. For hints which steps need to be performed, please refer to my transition note above.